Machine



(NoModel.) 3 Sheets-Sheet -1.

R. P. EMI/[ERICH 8v F. VONDERLEHR. BR-ONZING MACHINE.

No. 444,754I Patented D40. 8, 41891.

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lNo Model 3 sheetssheet 2.

R. F. EMMERIGH & F. VONDERLEHR.

BRONZING MACHINE.

Patented Dec. 8, 1891.

(No Mode-1,) 3 Sheets-Sheet 3.-

R. P. EMMBRICH xv P. VONDERLEHR.

BRONZING MACHINE.

Patented Dec. 8, 1891.

IIUHIIIII IHHI UNITED STATES RUDOLPH F. EMMERIOII AND FREDREOK VON DERLEHR, OF NEV YORK, N. Y.

BRoNzlNG- PATENT OFFICE.

MACHINE.

SPECIFICATON forming part of Letters Patent No. 464,754, dated December 8, 1891.

Application filed August 7, 189]..

To all whom it may concern:

Be it known that we, RUDOLPH F. EMMER- ICH and FREDRECK VONDERLEHR, both of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Bronzing-Machines, of which the following is a specification.

Our invention relates to an improvement in bronzing-machines, in which the sheet to be bronzed is conducted along a plane and operated upon by the polishing and cleaning brushes.

A practical embodiment of our invention is represented in the accompanying drawings, in which- Figure 1 is a view of the machine in side elevation. Fig. 2 is a longitudinal vertical section through the upper portion of the machine, showing the casing which inclosesthe polishing and cleaning brushes in position. Fig. 3 is a top plan view with the casing removed. Fig. 4 is an enlarged view in detail of a portion of the feeding mechanism. Fig. 5 is a partial top plan View of the saine, and Fig. 6 is a transverse section of the saine, showing the gripper in side elevation.

The sheet provided with its sizing or suitable adhesive material is secured to a reciprocating carriage and conveyed by it into engagement with a device for spreading the bronze upon the sheet, and thence into position to have its surface operated upon by rotating polishing brushes, thence to a cleaning-brush for removingthe superfiuous bronze from the surface, and is then released from the carriage and grasped between a pair of delivering-rolls, which conduct it onto the receiver in a finished state. As soon as the sheet is delivered the carriage is automatically returned to receive a new sheetand in turn convey it into position to receive the saine treatment as that just indicated.

The frame of the machine is here represented as consisting of a supportingstandard A, provided with asuperstructure extending to the right and left of the standard, that to the right being denoted by a and that to the left by a', for supporting the mechanism 1mmediately connected with the carrying and` 5o treatment of the sheet.

The upper portion of the supporting-frame Serial No. 401,966. (No model.)

is provided with a pair of ways B, (see Fig. 6,) in which the sides bof the carriage are adapted to slide. A transverse bar b', connecting the sides b of the carriage, serves as 5 5 the lower or fixed jaw ot' a gripper for engaging the edge of the sheet, the upper or movable jaw being represented by b2. The latter is secured to a rock-shaft b3, secured in suitable bearings fixed to the carriage and car- 6o rying upon its opposite ends a pair of arms b4, provided at their free ends with anti-friction'rollers b5. Springs h6, secured to the fixed jaw h and having their free ends loosely engaged with the swinging jaw h2, have a tendency to hold the jaw b2 normally away from the fixed jaw ZJ. The ways B are provided at intervals corresponding tothe points where the sheet is to be grasped and where it is released with recesses 57, into which the rollers 7o b5 on the arms b4 may be received, and thereby allow the jaw b2 to be swung away from the jaw h under the tension of the springs b. Intermediate of the recesses 117 the rollers h5 engage with the upper wall of the groove in The carriage is reciprocated by means of 8o an arm O, fixed to rotate with a shaft c, journaled in the portion a of the main frame, and having fixed thereto a sprocket-wheel c', connected by a sprocketchain D with a sprocket-pinion e, fixed upon the drive-shaft E, the latter journaled in the base portion A of the frame. The arm C has its free end connected with the carriage by a conn ecting-rod c2, the connection 0E the rod c2 with the end of the arm C being of the slot-and-pin type, as `9o shown at c3, by means of which there is a delay at two opposite points in the rotation of thearm C, the duration of theadelay depending upon the length of the slot c3. The delays in the present instance occur when the carriage is in position to receive the sheet and immediately after it has released the sheet, the former allowing time for the insertion of a new sheet and the latter allowing time for t-he discharge of the sheet just released. As the Ico sheet, with its front edge gripped, is drawn forward by the carriage it passes first between a bronzing roller F and a pressure roller F geared to rotatetogether. Thebronzing-roller F consists, preferably, of a felt-covered roller, having its upper side exposed to a supply of the powdered bronze in a supply receptacle f. The pressure-roller F is mounted in yielding bearings f', (see Fig. 1,) so as to allow the rollers to separate to permit the gripping device to pass between them. After passing between the rollers F F the sheet passes over the supporting-rollers G G and thence between the feed-rollers G2 G3, the former consisting of a series of disks spaced apart, as clearly shown in Fig. 3. The rollers G, G', and G3 are mountedin yielding bearings, similar to thosein which the roller F is mounted, and are caused to rotate in the direction to advance the sheet by means of a chain or gear g, g', g2, g3, g4, g5, and g, the several gear-wheels xed to the roller-shafts beingconnected by intermediate gear-wheels to keep their direction the same. The rotation of the bronzingroller to distribute the bronze upon the sheet is caused by a rack H, carried by the sheetsupporting carriage and arranged to engage a spur-wheel h, loosely mounted upon the shaft of the bronzing-roller and carrying a pawl h', adapted to engage a ratchet-wheel 71.2, iixed on the shaft of the bronzing-roller. The arrangement is such that when the carriage is advanced the rack willturn the wheel h in the 4direction to cause the ratchet-wheel h2 to be rotated therewith by the engagement of the pawl with the ratchet-teeth, and hence will cause the bronZing-roller to rotate and distribute the bronze upon the sheet. lVhen, however, the carriage is returned for a new sheet, the wheel h will rotate in the direction to carry the pawl over the ratchet-teeth without `engaging therewith, and hence the bronzing-roller will remain stationary. As the sheet passes from beneath the bronzing-roller over the carrying-rollers G G its bronzed face is operated upon by a series of rotary polishingbrushes I l', mounted in a suitable support and arranged transversely of the machine, the said brushes being provided with wormgearsz' e" upon their stems and adapted to engage the opposite sides of a worm K, by -which motion is transmitted simultaneously to the two series. The worm K is driven by abelt k, leading from a pulley 7c ou the worin'- shaft to a drive-pulley e on the drive-shaft E. As the polished sheet passes from between the rollers G2 G3 it is acted upon by a pair of rotary cleaning-brushes L L, the one arranged to act upomits bronzed surface and the other upon its back, for the purpose of removing any loose particles of bronze or other foreign matter from the sheet. The brushes L L are of peculiar structure, being formed of a series of disks of muslin or other suitable fabric placed side by side to form a roll sufficiently long to extend transversely across -the sheet. rlhe disks represented at Z and Z', respectively, have deep recesses cut from their peripheries in toward their centers, so as to form a series of yielding arms. For the purpose of utilizing, as far as feasible, the periphery of the disk and at the same time afford it plenty of opportunity to yield we form the outer portion of the arms of the disk of greater width than the p0rtion nearer the center, and in order that they may admit of the free passage of the gripping device between them we find it desii-able to round the advancing edge of the arm, as shown at Z2. l/Ve further find it desirable to arrange thc disks so that their arms shall form spiral wings longitudinally of the brush-shafts Z3 and l". The brushes L L are driven in a direction opposite that in which the sheet is advanced by means of a belt l, which engages pulleys Z6 ZT on the shafts of the brushes, and leads thence to adrive-pulley c2 on the drive-shaft E. As the sheet advances from the brushes L Lits forward edge passes between a pair of discharging-rollers M M the formerbeingpreferably formed by a series of disks spaced apart. The roller M is journaled in swinging arms on m', pivotally secured to the main frame, one of which m is `extended beyond the pivotal point, as shown at m2, and is acted upon by a spring N, the `tension of which tends to rock the arms in a direction to hold the roller M away from the roller M to permit the free passage of the gripping device. As soon, however, as .the gripping device has passed through between the said rollers M M and the sheet has been released the roller M will be forced toward the roller M into `contact with the sheet by means of a cam O, fixed to rotate with a sprocket-wheel o, which engages a lifting-slide o', which in turn pushes upwardly upon the arm m2 of the lever in which the roller M is mounted. The cam o holds the lifting-slide o elevated for a time sulicient to allow the sheet to be discharged from between the rollers MM onto the receiver P. The wheelo isdriven by the sprocket-chain D, hereinb'efore referred to. As the grippingdevicereaches the recess bland allows the movable jaw to openand releasethe sheet a discharging-arm Q, secured to ashort rock-shaft q, drops into position to engage the front edge of the sheet and positively removes it from the opening jaws as they .con tinueto advance. -The shaftq is rocked to throw the .discharging-arm Q into engagement with the sheet by means of a crank q', fixed theretol and connected at its freeend with a swinging trip-arm q2 by a connectingrod g3, the free end of the trip-arm q2 resting in position to be engaged bya pin or lug q* on the carriage as the latter passes it. The discharge-arm Q is returned promptly to its normal position, out of engagement with the sheet, by means of a spring qs.

A casing R surrounds the polishing and cleaning rollers and is provided with a depending port-ion r for the accumulation of the particles of bronze that may be brushed from IOO IIO

the sheet. A doorr admits of access to the lower portion of the casing for the purpose of removing the accumulated dust.

NVhat we claim isl. In a bronzing-machine, the combination, with a reciprocating carriage and means for securing the sheet to be bronzed to the carriage, of bronze-distributing mechanism, polishing-brushes, and rollers for supporting the sheet as it passes beneath the polishingbrushes, substantially as set forth.

2. In a bronzing-maehine, the combination, with a reciprocating carriage provided with a gripper for the attachment of a sheet thereto, and means for distributing the bronze upon the sheet, of carriage-operating mechanism, the connection between the carriage and its operating mechanism being such that the carriage is allowed to rest at the beginning andl end of its stroke, substantially as set forth.

3. In abronzing-machine, the combination, with the reciprocating carriage and the gripper for the attachment of a sheet thereto, of a discharging-arm under the control of the moving carriage for releasing the sheet from the carriage, and means for distributing the bronze upon the sheet as it is moved by the carriage, substantially as set forth.

4. rlhe combination, with the means for conveying the sheet and for distributing the bronze thereon, of a nishing or .cleaning brush consisting of a series of radial Wings composed of soft fibrous material and having their outer portions wider than the portions nearer the axis of the Wings, substantially as set forth.

5. The combination, with the reciprocating 

